Dielectric strength of rubber is around____________?
Correct answer: C. 30 kV/mm
- A. 5 kV/mm
- B. 15 kV/mm
- C. 30 kV/mm
- D. 200 kV/mm
Explanation
Rubber has a dielectric strength of approximately 30 kV/mm, meaning a 1 mm layer can withstand about 30 kV before electrical breakdown. The other values are either too low or unrealistically high for ordinary cable rubber.
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